Which function does a router perform in a network?

A router serves a critical function in a network by connecting different networks, allowing them to communicate with one another. This process involves directing data packets between devices on a local area network (LAN) and external networks, like the internet. Routers use headers and forwarding tables to determine the best path for data transmission, ensuring efficient delivery.

This role is essential for enabling devices from different networks, such as home devices connecting to the internet or enterprise environments linking multiple networks, to exchange information seamlessly. The ability to manage network traffic and implement security measures also enhances its importance in maintaining network performance and safety.

In contrast, storage is not a primary function of routers; devices like servers and storage area networks carry out that role instead. Designing a network layout is typically the responsibility of network architects and engineers, focusing on how to plan and structure the physical and logical configuration of the network. Installing software is more related to user devices or servers rather than the core functions of a router.